{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118475501",
    "entityType": "Track",
    "nonce": "0x1594350eb486e2a0d7fd6acbc5bd7df3521f23fcbd044d867f7154b1f41e72b0",
    "signature": "0x0d56efeeb6f5fa8dc69bdb0a8e847bbc7e5c14e03b752c58564fe38cd3c7751e1d6e46bc5c5e930b2a8a3f5ac5c19908c0ec8f79055e9b099840d001507b3ad71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}