{
  "manageEntity": {
    "action": "Save",
    "entityId": "2075079420",
    "entityType": "Track",
    "nonce": "0x66622aa79ddd89ddac2f8d18ef0111ba6691a1933ce3d5385ecb18d2a5679dfd",
    "signature": "0x11d243b54a1b3aa1b06d6c5e7666f2051f99f13a14763d35719c7dda664e56de069f6bda9c4eaf9cf2a26993343de9ece6f955fe46e4603dff3b7b6286dd7b451c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}