{
  "manageEntity": {
    "action": "Save",
    "entityId": "115211",
    "entityType": "Track",
    "nonce": "0x6289a44f39f7d14c32b0835b95d62efc3fb1f6e77016dbe59196579381208991",
    "signature": "0x0355f1df994a6508cfdb7959652f4330b73efdc51e2003b742ccf67dc1975fe94a94001dd9323b07831663fb0c5fbb4282a2878c70f05f8a339037085718d5561c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}