{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401167675",
    "entityType": "Track",
    "nonce": "0x1c5769f2a39ffcb96e00a81f78c01dfe0edaa290d1ebfce516e73e7d5ac7f3a8",
    "signature": "0x06f1d8fd2358d81b7060a34538cffb49e0036de0bc0394619a7d6388700bc71553702303313dd36b3e45eab65c49baffab4c1c38f967e2aa42036fad0aa445251c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}