{
  "manageEntity": {
    "action": "Save",
    "entityId": "959292741",
    "entityType": "Track",
    "nonce": "0xda933762d8911abc3a8159238f690adc83dfdff17e78d2dd1388dd17327f2282",
    "signature": "0x535f3dd5caa8fb049cc8bd85a764e4b0da3d9b2808e21c8f27c9b1cd29ceb714079d53b4e4184d33aeeae09bfa92469553ed78eae51cbfa9ab4fae1700555eb51b",
    "signer": "0xCE9D1a025cd6434924F76373A4B18f1C44A1BDD6",
    "userId": "196984511"
  }
}