{
  "manageEntity": {
    "action": "Save",
    "entityId": "14660171",
    "entityType": "Track",
    "nonce": "0xbc40528d3d244c81339aab5ec88ebcf45b7d4462775321706bf8439a875b9678",
    "signature": "0x754b0323e47cde62e888aa9f7004076dea2b1769f152fbd62779a96015cb501c6fdf3847608e02fc4b196f654a8f9eaabe7e23282fc6b61170135eeeaf5faad51b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}