{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969413931",
    "entityType": "Track",
    "nonce": "0xed60a4f8562f4d869c460973d78960ebbabdccf2195f1213322dff6765f2c13a",
    "signature": "0x5ac645d00e560ac78dde6fe3162b2f5fd4570f0a0a2cd9c3781a3179834eaccb68a3de80d7c6e36dcd7ae33addf6794b407423cc92201e9de8d097a3fb0ab1f01b",
    "signer": "0x45C74e4f36E4e5064C5321eeED3748fD52B04eA8",
    "userId": "133970929"
  }
}