{
  "manageEntity": {
    "action": "Save",
    "entityId": "2141219813",
    "entityType": "Track",
    "nonce": "0xa85eb0c6a07e2bd6ec35e04ba5a18ca34ecbbe1d2aeb343197e927ad58116452",
    "signature": "0x6bf2108ff7c423a998b33dfd7754c6f0dc14c7dee74d16a856c10e07503ac6746203d3156d608e5935f287ff35b1d3d1bbe34cbe2770538acd2693880973a29a1c",
    "signer": "0x94d1769762bc3a1e7DCd3e8a31C89Ff199833Da6",
    "userId": "715573876"
  }
}