{
  "manageEntity": {
    "action": "Save",
    "entityId": "986459",
    "entityType": "Track",
    "nonce": "0x1a57072ebdcfa4b8634bc6799c7fa71327ae369ffa5b4b5f453fb7877e8df444",
    "signature": "0x88aa5e0059c1c3e61780e78ec3beffe095d214a79922251f0e4eb89f5fbbf61a3547a29878aca3b5f1008fa471cbb5a27545e59e3ba2cd88e69b5901425927191c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}