{
  "manageEntity": {
    "action": "Save",
    "entityId": "1855288644",
    "entityType": "Track",
    "nonce": "0xe5efb577f75d2b74c3ca9962c498290e21122431130af0e0083ce614e522dcfa",
    "signature": "0x4b066a7f2a19a8598ca0c68a8fbe04cefd993ad191629316f128fae8cbf1704c1b221511c6234f52c45b9364d8f196ff7629458ce5bec9ca7bbc887ac7b82c881b",
    "signer": "0x0BbaE3b1B763858507f1A953DC2f9Ef8343268D5",
    "userId": "307156675"
  }
}