{
  "manageEntity": {
    "action": "Save",
    "entityId": "1101781",
    "entityType": "Track",
    "nonce": "0x5eea4d2c8f635ec1e873c9793740e46955affe9ec4b412352621f7cbf87a67f3",
    "signature": "0x17e7f516a722628ca49b666ea82562e01e12636ba42d6bec6a902173d4be0f8f1050a8423d8a721479e514c9cf206a8c4504e5893329ee570dca18bc88a7530b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}