{
  "manageEntity": {
    "action": "Save",
    "entityId": "126456268",
    "entityType": "Track",
    "nonce": "0x4e42dd4e6c6b3472ae80ea2f5488413d2c337ed80c1ed3fd6925b23555f2173f",
    "signature": "0x209b66168f1df9a68dcdd6a91616135881620e300690f95ef3c8dc0907c8822b6d7f43a507629ef3a2a77f055e35f0ce0d30a26f9b170bf24106764b4e1d91d11c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}