{
  "manageEntity": {
    "action": "Save",
    "entityId": "1178373015",
    "entityType": "Track",
    "nonce": "0x2466f528259b52d1b16e53e4befacf1ef26c91b8d5ef840996bc1039d8f3aa28",
    "signature": "0x8d588408c08eba280ee20646c7a986fd655af30a1117548f3efe81c9c12f9a6a1e741f579ecbaf778b1a771d29a119fa7cd89e634898254dc799ecff2c585c3d1b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}