{
  "manageEntity": {
    "action": "Save",
    "entityId": "1929800522",
    "entityType": "Track",
    "nonce": "0x2f22b1e8cb308150c027aab8206336fb252d80b972232f37f1364eef1ab2665e",
    "signature": "0x8df4148f02b5a0477e9634fa160ae7a8aa0909593c9e4d9ac3bc44de97a0a0292b4ad920ab92ab2b30650f6a03857001a055f3008055c07a48419f799c1c7eaf1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}