{
  "manageEntity": {
    "action": "Save",
    "entityId": "85616",
    "entityType": "Track",
    "nonce": "0xb522d8f3017ba31156713372926a5a0da5a7910e2ae9ed00a7dc97b66f37b5c3",
    "signature": "0x1dd359b2c6083d98023d44a3455cd5e1491e5b98084045e6656d5a90859e83750e796f853b70ffb671e69569fff242fb55e614588946d81256fb669c017c4c741b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}