{
  "manageEntity": {
    "action": "Save",
    "entityId": "178680819",
    "entityType": "Track",
    "nonce": "0x4e9cb890d3b528d70a70a0f910a2288c2b8d16e13a2e7f30bb00370ef61080b1",
    "signature": "0x003d7d1909dbca633ff41c121e617b79139ca38a0b60fb7d133a912d06dcfc0514e48e0175db3d77e12b29d0e695c272fbe0f144fb67b1835e26e3f97282bf711c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}