{
  "manageEntity": {
    "action": "Save",
    "entityId": "972733262",
    "entityType": "Track",
    "nonce": "0x35b61a83c8e11eabe7b1a425d9c0f4e85537c3e86bf2c7d30f66a637cc5976ae",
    "signature": "0xdedb8ae080bbf017f6d2bdb04cdf7622f4110c1e85f73aab4efdde6da0f20bc6140623f7db581215be53eb34b9722888ab94785007882b125b0ebb798320d5531c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}