{
  "manageEntity": {
    "action": "Save",
    "entityId": "1061875314",
    "entityType": "Track",
    "nonce": "0xf9b180a210f2e69176c55145667d8960a3f4098adcfc61d66f2abf6143ae684c",
    "signature": "0x9ecfd019a561fb5f415070bdb42c442d2e4b0de99c4cc2dcf56e3e159df2ac8914ff09121f8f5c3321448c7a8fef289c4ab3798509295e0d1e07b824d64cd8041b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}