{
  "manageEntity": {
    "action": "Save",
    "entityId": "1550296584",
    "entityType": "Track",
    "nonce": "0x5f28bec02cf5b6ac5ba3c6edd77efc4e3b218a92464db5c1ff675ea9e96c2527",
    "signature": "0x9aba5cf57b13a39d2e768ce8047eae29fb05914e1bd0be4425dc4bf420b02f7c1084a3af5ca2d1e149fabebfbe11e2448e6e3a42b9f2806a452675da072fd4e61b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}