{
  "manageEntity": {
    "action": "Save",
    "entityId": "330379",
    "entityType": "Track",
    "nonce": "0x97473ff5f79fbe5de7d5010d31f98d25b640e7582befafc97f1d6d94e4b5994e",
    "signature": "0x42d83ec7c1cc38c23f9baaf7bc49e59d0ab70759223e90a3422b08d625c18027763b1d83b984ebfdc65edf8e465c44a98e43a2873d3ab7936a8dfc5608c381521b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}