{
  "manageEntity": {
    "action": "Save",
    "entityId": "91772057",
    "entityType": "Track",
    "nonce": "0xae91b82ec67ed48c362fc178fef65027ad920166f91a7f5f91ae9479d35558af",
    "signature": "0x762de98c82c9ebd95939d9b64dcacbaa5899e4d3e3ab3b8743af7098984305b006a4a8d171dda10bccfe76a633f9c6996c35138d12820d5707f924e0b51385121b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}