{
  "manageEntity": {
    "action": "Save",
    "entityId": "78947378",
    "entityType": "Track",
    "nonce": "0x2599c1d6f9a4efaa800838c7e8a5be7479ef99ff9d66ad9dbc3dc6c787b22957",
    "signature": "0x0d4b56858a576d412e006cc167954f459a2eb710737bc2756042991fb7233dd6072a2cbce9bce72bfbf301eadacd77de914cc3a20088a136fde9f27e310656151b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}