{
  "manageEntity": {
    "action": "Save",
    "entityId": "954491214",
    "entityType": "Track",
    "nonce": "0x6253801b40020d684ae842353e26e5a4b9beaa54e87413393e96d4144916c32f",
    "signature": "0xb52e80f598660414ffeba812715a1e1646aead5949167cd51f492c35ed9b3e5814c2c1b60314a73cb2f0796638435b6dd3d92260a8870db7f56321cea6054cb61c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}