{
  "manageEntity": {
    "action": "Save",
    "entityId": "2016255080",
    "entityType": "Track",
    "nonce": "0x99b7d45c9fd70409c2bc92c79844ceb845c4ecfa7b78360b5d20c1f89d14fd34",
    "signature": "0xb646509872b15f82f707ffc11d58e0526cef81f40b76e90216fae6f43b0c72967c551af7537bbcf02ea9e42df352aa04629a152b9cd63594e185e68e294741581b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}