{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098359",
    "entityType": "Track",
    "nonce": "0x72bc7c2001fae7529b709fa3e8df760de04d603a1fd87d08cbe29f709c72620c",
    "signature": "0xcbf391cc82a9a4d22d2954fbb8e4202c447170321cbaf210fe731c5de1d5337765c0b2d3f5530c59f612ade6db4667e61e5e93c0ca3e2b4044128083407ffa0d1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}