{
  "manageEntity": {
    "action": "Save",
    "entityId": "21738",
    "entityType": "Track",
    "nonce": "0x08b43c95025db27782e2ca2b2c36262549f1ca3a005f07bbe6d0ebc0c868ce65",
    "signature": "0xee92f281ec20cc56ba30bc15b8a80c012103aa2f74ddba5be3060f5d603a4ab87390cd262d61241de0627e61650219410a5f290c5294ecd046dfbc950f67556c1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}