{
  "manageEntity": {
    "action": "Save",
    "entityId": "70817364",
    "entityType": "Track",
    "nonce": "0x4c0ef35a03ae5181b685a1f22efde26712037f2fcb6c9e1c7b1b9328fefbc98e",
    "signature": "0xdc58275f5609125882bde22dc8fcee69363f6634556e53e50df46643e85e126301758f3e51abbda574fc3a6098bce198c77b69b2eb742187eb3178807d0461481b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}