{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121291050",
    "entityType": "Track",
    "nonce": "0xef86607cd4ebbfbefc5154ab83e6a6fa6074364847251e5c7b993e5a4cd7db63",
    "signature": "0x9dd8b4a26e7dd8a254b78df585674e7916caeaa2114b8ebab957d4e7d85bd4bb4f55521cba430336663110035c6f60e8c8781073415ad5e54789cd62e746d35c1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}