{
  "manageEntity": {
    "action": "Save",
    "entityId": "1898193853",
    "entityType": "Track",
    "nonce": "0x83192be7794b1292c69143510c4ae8417a85fd86396f2314889eccb7d07ffc82",
    "signature": "0x1a720211d7bbdb152b4e40bc86220be79f3f6d6da8dbe6058679d20fa2b79b853f619c0345f4be121385a8e141f05b9917d37eb40511d8cea5ccab0296681b311c",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}