{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525568838",
    "entityType": "Track",
    "nonce": "0x7059eccb5e49311e7ae558623bf82fe963e2f1059212c3f2d0c04adccbb559e7",
    "signature": "0x42eef1657832ad2da714dcbd878641591e8c153f79bc8630cec5b0ed61810250339e732d1621e48bf183f032141e5ffccb708c510e122ca5ba78e5f12d402ac21b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}