{
  "manageEntity": {
    "action": "Save",
    "entityId": "291325813",
    "entityType": "Track",
    "nonce": "0xdd1d4061f7718d0c95335f63ec660e1b1d85e5bc2233da64862c1ff4535daf04",
    "signature": "0x1bb72609c69913f758be455cd6edcaad2fd8bfa9127e2e71c98418f348195e3070ce6d5e08bcbd93da4ddcc511700b9cb80b909997ae9bc0ef39ee2d3f6ee3e71c",
    "signer": "0x92a5082636c97Db0Ae888484D85e4c8494A3B791",
    "userId": "895527427"
  }
}