{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073302555",
    "entityType": "Track",
    "nonce": "0xd8dc30d13b4f907113361919612d0164ffb57b7bf36d3da2a736b6a2b8139a37",
    "signature": "0x9b642118b2c22f03288cfb372c7980bdf44d07f1ca108a3206adbff4a5a8e3264239ae5a22ca6d5b68041ce6d6523543c1d2e57cd8a92c158a52da00182678311b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}