{
  "manageEntity": {
    "action": "Save",
    "entityId": "915760097",
    "entityType": "Track",
    "nonce": "0x5893ab1129ed14467ab26e8eabab8947a2bf3a4e0ed00ecd147217b061a59bbb",
    "signature": "0x99c2027a137cc1b8aaf6a8dfb23bc178f16045134a6cc54623fad10ede6e8a2a227fe7ed06d25a445741271771bab3913a9e4d0603909cc9d993c3b74fab9b6f1b",
    "signer": "0x629256a8696F1C3BF59aD9204C3Aa4dC8bc4C07d",
    "userId": "871265631"
  }
}