{
"manageEntity": {
"action": "Save",
"entityId": "590585750",
"entityType": "Track",
"nonce": "0xa8109b90fc586d4a097571315790f19919e20e5c0c31b169683fec3cfc532e9d",
"signature": "0x0bdba6d2b62d7d68b57b01db48ea69b6925911dd8652f70d0cbaa4a98797341b3cf2a2fb0d0bbcbe0a261f6fc9ed8850049f73d1f8b760cceca115666e8c08791b",
"signer": "0xD7c3dC9EEf2D94568C0e1A9C88b58696850c7C22",
"userId": "125737"
}
}