{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "688811946",
    "entityType": "Track",
    "nonce": "0x42e18674c7c41f4095128fad1a0dbea6f0cc9ec2cffe82020ec06f17167e452c",
    "signature": "0x58289fd019555bc616fef902ceb0bed4793fc238eb5799961178183a647089a62a225f9c12e32eff2a77f8ce0f81ad0da0703f5ee0a3554ec8636784bbff7ac21b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}