{
  "manageEntity": {
    "action": "Save",
    "entityId": "1278209086",
    "entityType": "Track",
    "nonce": "0x0d81632699881f07708b030cb13e7da52ed1676ff115000456fcc2b27e0a0038",
    "signature": "0x30e91afdd94e31886384e843f7d0852210fc640f00f9b65c52c9c3a1f3d1de254cd7b01def8a79250edb5fcd287dc50db1f28670b458687fcd4d1707d6f9938d1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}