{
  "manageEntity": {
    "action": "Save",
    "entityId": "1463980973",
    "entityType": "Track",
    "nonce": "0xa06bb589f59c380ce16b1f1a608cf91e11fc01a9943aa00347b16c142ff8ffae",
    "signature": "0xa67254a6e4aef95c2a54b551efc1d3581439213a3b0b9bc0469bb5fc5b0298742bc078dae3b22affd4847793d614af351f231e6f427b7e98d304aed41d796a7d1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}