{
  "manageEntity": {
    "action": "Save",
    "entityId": "541253",
    "entityType": "Track",
    "nonce": "0x2a234ad4fcf2c69c813fac9fee016e3e67f6c211fde15c30866fbe6d00f57540",
    "signature": "0xdac8062e9640990c2f44f6d19ca835c1d62c6f7316f429c224cea104b3558d254de6784ab7fbf9c0fd4ae316e8e77de0642860e7762724ef83e5215350a5de931c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}