{
  "manageEntity": {
    "action": "Save",
    "entityId": "1226503254",
    "entityType": "Track",
    "nonce": "0x9f809c22bc3f2f12c5838354f8301425d2fa0b20f82ef56e15e588808bc93bd3",
    "signature": "0xa18c3cbec807d628486874760a0dd97621570d69f4f6cf183542a31f56f8900f5c774f99d3d587f0924218e2caa19b2acc67a284d9a22fc9747f05a45b6104201b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}