{
  "manageEntity": {
    "action": "Save",
    "entityId": "997960831",
    "entityType": "Track",
    "nonce": "0xc8e224ae52ff088bfeb620c8afc5162960b3712079bf00c1ff973b5917ffd56d",
    "signature": "0xcc70a8c6ca36e2b93e2262b414bd756383483a5650282634e62e54a392bcc4b92c008aa8577607f2554ab56a8be38cd4c4a57c0e1cb9218f224f33707c2087051b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}