{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514946741",
    "entityType": "Track",
    "nonce": "0x35bdd0f2f82243622ee1bb21811ab0695401f990a377fb05b864665f7ec07dca",
    "signature": "0xab89530ce0b3e68dbd6f49d7aa8f9780c47feaaa1012124cbaf87f06f125a25a05177e6ad90a9b4bc9d544b6824882598e3ba1ae6fe53c34ba71ebbb37993db71b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}