{
"manageEntity": {
"action": "Save",
"entityId": "941897315",
"entityType": "Track",
"nonce": "0x1bc54c0dfe432b3f3756bae27739cd71174358b3c7acd25731c0fb4fdc1c9293",
"signature": "0xee8cad10bd694f2e8b5cc258a308adadd96c8a11e5060f73dd86f911968137bf19a4a5f323629abaa1df28dd9d6a7ff2f6a5744a034d6dcd1decc4ce5234fd651c",
"signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
"userId": "667809204"
}
}