{
  "manageEntity": {
    "action": "Save",
    "entityId": "1253106798",
    "entityType": "Track",
    "nonce": "0x84fcf0da0f428ba9ca099f1c7427f19a07352f4ec66aeb60c1a3afe7b9262f20",
    "signature": "0xc3a3a1182a3029c0ab993a5ef0b3d8d05b1ee73fb9e8b2b63942f945666f84087c67aa10830b7db70e4d5e2ffc7a00eb3aa20e15335c88a59183a4e0a77668e51b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}