{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210735237",
    "entityType": "Track",
    "nonce": "0x4b1c1c17c3bc7e98c400a40a5c02a514f2cd61f23cafa103c0c06840cddb5c39",
    "signature": "0x2cad3de622b3dab6b5f2e2e8d56bea9c2773692cb667b955af77aac5dff7bd196ce767701e69ea6c19760c5e56f082912055af5566bae0e4e074261d9c1acc051c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}