{
  "manageEntity": {
    "action": "Save",
    "entityId": "1102124",
    "entityType": "Track",
    "nonce": "0x07ed181aac561e92df6f37cf614e1b96773cd861e700cb7520643cc5ff91ca5e",
    "signature": "0x90af761c1ac8ad7ff187ba4ac1573c5ab01a7ff48824a4a0d70ce8693a875a506d8b1282091f9d2cf5612182ef42c65860569e4af0f5a509aa3dd49fbce8fefd1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}