{
  "manageEntity": {
    "action": "Save",
    "entityId": "1016324659",
    "entityType": "Track",
    "nonce": "0x7fe286f3988a9a15736312e4b8f21aec231f5469e6d6c67e98baf3019596b4af",
    "signature": "0x7336c1a81e3cfd4828b73c9a96d55a0c457fdc67071da3ef1c384fc9178cf5b610b1b6cd2fd9dbab96589e18b54da1b3ee5c9c73d00fe486a2cc08dbd05a0db91b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}