{
  "manageEntity": {
    "action": "Save",
    "entityId": "243540083",
    "entityType": "Track",
    "nonce": "0xca6f44b92178bf258c31534cb728a243ca6ce5816e477d86689aa1ef4d53cc62",
    "signature": "0x4aa9915935c4b54656f904fd431d3269bac8ea9563c93aeb05320516fe8cc17850d4202a8ec78e6d9b36a7c14be1b0d777fafb01a17b88b4670b3e124a9714a11b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}