{
  "manageEntity": {
    "action": "Save",
    "entityId": "251859269",
    "entityType": "Track",
    "nonce": "1786634492686037104",
    "signature": "0x6a80721f35d62ce0945a7b9714c1736aa9ed67a2645088bc3f23b6b69799a04a373615933f6add737755fc0d3ca44d26bc2fcf861314283421e9c988774bf5181b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}