{
  "manageEntity": {
    "action": "Save",
    "entityId": "87889080",
    "entityType": "Track",
    "nonce": "0xec5467e4d99ac28df2b56b50be25099e5f5ba4e35b4d7e494e9214ba6f084179",
    "signature": "0x35dfd00054725e13a4c48ac28f40e9dcb342ebbbe83217170abe97223a8e01c90e95d6fba1b9f057e2307a64765ccd82d9cfbcf594bf5e6ddf559fc86dab39a91c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}