{
  "manageEntity": {
    "action": "Save",
    "entityId": "985710",
    "entityType": "Track",
    "nonce": "0x57c4f463542561d95f81c1b2eb36f055eb3fe8430f68e17e88d565b371f9d54c",
    "signature": "0x742ceba53585fd00e4903da87e190f6aa775ef9abd477c5111902abb0af305665d2d5c57de68200bd44fb4cf282ce6c9e598f614a7db6771904d0fc8a1d7094b1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}