{
  "manageEntity": {
    "action": "Save",
    "entityId": "740374",
    "entityType": "Track",
    "nonce": "0x9c1582773b0558b1f2790e53853d5735569e36295a46e1d2c08700a0390331a0",
    "signature": "0x7d4fbb00fca48832ad16bae1a00d3b63f1679c476397785e965a739a1b6eac604273274ee93d0c51126cdc28ad4cb47d3ed87f652592da578ef5c72e69645eb41b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}