{
  "manageEntity": {
    "action": "Save",
    "entityId": "1507129729",
    "entityType": "Track",
    "nonce": "0xfa51c56d219e12da36b65d6dd853a92a84a349ea4ab91adf41b6c5196255f6ce",
    "signature": "0x1a27f77d6f270ba2e59cdb89074cc3ab2124172a7bc29b7251500552eeb491fc22ec1e24debb763f06cf81e2d29b2e837c9a20de7f8a88426b47f1216d2376011b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}