{
  "manageEntity": {
    "action": "Save",
    "entityId": "997999109",
    "entityType": "Track",
    "nonce": "0xbba1f407ba628c25d9a29e0d6a65c7c580b8d5e23757ce2f6f67870cf7d7f968",
    "signature": "0x983c4e8c5e5e57d195817be99c5aef641f70a3cbd175507e17eb7551dceb96612b3ac7fd22cae2ee09caac3ed987a7cf3488b1726ac6bd31a81e1dde98859e971b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}