{
  "manageEntity": {
    "action": "Save",
    "entityId": "55252337",
    "entityType": "Track",
    "nonce": "0xcfe4422db75944646af2b1f9754ce48cbe82522ca44382266f4884e25498a15b",
    "signature": "0x631d66cd85c0324455b3e3f70ec99e5ef15c62c48f210cf0d9fc9070a7a8efe537612f116c03bda6dbcafb141acab3c023a28ffc323aad5aa8480782c0f30e501c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}