{
  "manageEntity": {
    "action": "Save",
    "entityId": "549276906",
    "entityType": "Track",
    "nonce": "0xa1cb3c98317f93981f2b6d981101c61636b2aba6c034206dd4522ee033b3a4f2",
    "signature": "0xbef9d4355edff4518aae17799c28bb20bdfd8842bd7052b41d09cdc5d7548c0d489ee70f22d858df3f0d818d23abc4b157972ef67ea8f5f621aecaaa839ab3f41c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}