{
  "manageEntity": {
    "action": "Save",
    "entityId": "1252856210",
    "entityType": "Track",
    "nonce": "0xafb29b461995c1b1e5c4512e8565d165a29d01f04e91b505ed69f7bd3161a3f8",
    "signature": "0x0c82e78332b150843df53e3adcd4a21d54e62d5e24b7b53c079ac9285b06dde27d566bd484234f1997ab23547c0455365aa7fddc83fce2e55f84947a0154c9471c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}