{
  "manageEntity": {
    "action": "Save",
    "entityId": "819507415",
    "entityType": "Track",
    "nonce": "0x7038347a5603d508bf2fd43ce4a604699780b878310807ba95ae29d7d72400d3",
    "signature": "0x80fdb2b5e2d2d263692d8339c5b736b62e202a4eed79e47fb26099360e50815d0eab5edaeb63a589db1c59f128e626c28ba6569d01c2a754d76f2bbadc3d9eb21b",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}