{
  "manageEntity": {
    "action": "Save",
    "entityId": "436500797",
    "entityType": "Track",
    "nonce": "0x84b6f0913e0dcc3023267043a2083bfb01c2f86395a63b79c1c4918b02796aa3",
    "signature": "0xd6e3d7d0f815f82506c767bd7e2590968c50902b2d7cba877cd3c51d471d990f0082f0954c7548c66f73fa7bc659c83b99644a1d7871f57078769dadc175635d1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}