{
  "manageEntity": {
    "action": "Save",
    "entityId": "818131302",
    "entityType": "Track",
    "nonce": "0x07e153baf151126879532230f247e676850ee6eb52a7b7e616dea52d4b4ed9bc",
    "signature": "0x8257ff723099e3336177f01dd16bb39ade81c26ab2a48d8e4f47f72b0fd974f43f7b36a2f98211752b24a799c77582a9761933945416aa86543c7e6a8ca8e3a31c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}