{
  "manageEntity": {
    "action": "Save",
    "entityId": "515861479",
    "entityType": "Track",
    "nonce": "0x986c9844b196e4e29c3bd4a2ac3f719c1b468b61f1f6f7bdd96f9516bf5a1198",
    "signature": "0xdbffcbce29d8f6e16d2e5c496d667748ce19a3af40679a882b24e2278d1c3f7b434cbf32cbf4ba32604e7015d30b16dd7c75338671a0c0bca62a795fc22e97181c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}