{
  "manageEntity": {
    "action": "Save",
    "entityId": "1978043945",
    "entityType": "Track",
    "nonce": "0xa176bca76093b05cf72f59635e3750685497dd95561cacd15c30aa16799629de",
    "signature": "0x75bdac0dce600b3f7ebb69f9baa552cd18438e827eb56ef8f23c5530975a936d00366824a9f47868151e55535c2548695cc53adacf25cd7f78d17898a4ad889b1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}