{
  "manageEntity": {
    "action": "Save",
    "entityId": "202886480",
    "entityType": "Track",
    "nonce": "0xb767a7ecb4741b44400c6d48f20a60ca1e5fda00a26355091d02cd26d26b34d6",
    "signature": "0x7a474ff53e8d889f924b38a66b069c0ace6dc2f9e444961b3c6913fefc0d6cc275a979252642d0ac20980d1b71579c1459a0dd14f47b2be648ce434745dca7af1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}