{
  "manageEntity": {
    "action": "Save",
    "entityId": "1801621428",
    "entityType": "Track",
    "nonce": "0x03e9e4aeae6662f2b5c3201c8621257f7b523600cd13dbf66254a3576ff2dbba",
    "signature": "0x33d2d6ce7d5868a8c28e91897ec7541d67b1021ffb106ad37784750b2083aa797fca24a70fc0c1eda7db38b417c93b9040161da01954bdbe86b1f1b88fc5efe61c",
    "signer": "0x2F1E2f294c3e55dbeFEDe10ec5A6D29646572668",
    "userId": "478987064"
  }
}