{
  "manageEntity": {
    "action": "Save",
    "entityId": "2005437015",
    "entityType": "Track",
    "nonce": "0x75e6b9d226907ccf854b240f3994fc56bf18b0d7c1a328092af781410eeaa484",
    "signature": "0x0717726df4cd81db539a254ab6432a092466167d06361bbc3cd78c10892e76dc52fbcac6f13d1c781064faf0a716abe98852293057c04544eeec4bd7e49a81ec1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}