{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781356835",
    "entityType": "Track",
    "nonce": "0xaf2fd984601f24811d56bbf81c68fcb76341e0b5ae56395901eb76875182959e",
    "signature": "0x0a5917048ab07fc84f42492976ae64dc09abc75c83f4a9df4df29f58df8d8b9471e75499a20eee2bc79f6c43138d8120b54efb54b5b4a8727c5db756b741a9171c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}