{
  "manageEntity": {
    "action": "Save",
    "entityId": "789283526",
    "entityType": "Track",
    "nonce": "0xc58e5b6345110d4518799b3526bab6c98aacea7b30ebf58556aafcc032fd498e",
    "signature": "0x55b928d09bb4fd081efc4cc541a80f51813e1dd36511e8b061e80cc890fb8708601a971603cc36826a0bb098bf96528cee57c27b74fd6c102401c7bec282694c1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}